Locomotive-boiler furnace.



F. F. GA'INES.

LOCOMOTIVE BOILER. FURNACE. APPLICATION FILED APR. 10, 1909.

934, 1 57, Patented Sept. 14, 1909.

2 SHEETS-SHEET 1.

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of Savannah, in the county of Chatham and following is a specification.

' tlons or in existing locomotive boilers,

-tion of the waist of a locomotive boiler, illustrating an applicationof my invention, and;

respects, of-a. construction known and ap- 7 one or more firingopenings, 5, controlled by suitable doors, in the usual manner, and a anash pan. is to be located, as in locomotive ATENT- FFIC FREDERICK r;Games, on SAVANNAH, earmark.

LOGOMOTIVE BOILER FURNACE.

Specification of Letters Patent. rat nt d S pt 14 1909 Application filedApril 19, 1909. Serial No. 489,064.

To all wh0m it mag concern:

Be it known that I, FREDERICK F. GAINES,

State of Georgia, have invented a certain new and useful Improvement inLocomotive-- Boiler Furnaces, of which improvement the The object of myinvention is to provide means, of ready and comparatively inexpens veapplication either'in new construcwhereby the recognized advantages of acombustion chamber interposed between the grate and the fines, in theparticulars ofeconomy of fuel and increase in the life of fines, may bemade available at. a materially less cost than where a combustionchamber located Within the waist of the boiler is employed, as inordinary practice, and a substantial reduction in the evolution of smokefrom the stack bealso attainech The improvement claimed is hereinafterfully set forth.

In the accompanying drawings: Figure 1 is avertical longitudinal centralsection, through the firebox and the adjoining per-- Figs. 2 and 3,vertical transverse sections through the firebox, on the lines a a and bb, respectively, of Fig. 1.

My invention is herein exemplified as applied in a locomotive boilerwhich is, in other proved in present practice, having a wide firebox, 1,connected to a waist, 2, through which a plurality 'of fines, 3, extendfrom at the forward end of the waist. The rear set of grate bars, 6, ofany preferred construction, is supported adjacent to the bottom of thefirebox,"below which grate bars boilers of the various standard forms.

In the practice of my invention, I provide a vertical bridge wall, 7 offirebrick or other suitable refractory material, which extends entirelyacross the inside of the firebox, between the fiue sheet, f, and therear water wall of the firebox, its top being ordinarily at a distancebelow the crown sheet cqual'to about one third the distance from thecrown sheet to the bottom row of tubes,

and its bottom adjacent to the bottom of the firebox. The primaryfunction of the bridge wall, 7, is to divide the space inside thefirebox into a fire chamber, A, extending from the rear side of thebridge wall to the rear of the firebox, and a combustion chamber, B,extending from the front side of the bridge wall to the flue. sheet, 4:.Inasmuch as the proportions of relative volume of the fire chamber andcombustion chamber will be governed by. several conditions, such, as the-a length of 97 inchesfor the fire chamber and 27% inches for thecombustion chamber. It will, however, be obvious to those skilled in theart, that my invention is not limited -to these or any other fixedproportionate lengths of the chambers. I

The bridge wall is supported on a transverse bearer, 8, ;ofsubstantially inverted U section, which is secured, at its ends, bybolts or other suitable connections, to the side portions ofthe mudring, 1, of the firebox, and

has its side flanges projected upwardly above its web, so as to providea seat for the lowest course of brick of the bridge wall and prevent itslongitudinal displacement. Bearers (5 secured to the rear side of thebridge wall bearer, support the forward ends of the grate bars, 6,.andthe rear ends of said bars are supported on bearers, 6 secured to therear transverse portion of the mud ring, 1

A plurality of vertical air passages, 9, is formed in the bridge wall,7, each of said passages terndinatin at its upper end, in an enlarged orflaring ischarge opening on the rear side of the bridge wall, near itstop.

Air supply pipes, 9 which are secured in the bearer, .8, and formexterior cont1nua-, tions of the air passages, extend forwardly, byreturn bends, and are provided, at their forward ends, with flaring orfunnel shaped mouth pieces, 9 The currents of air which enter theair.passages,.in the forward moveconnectionwith the air openingsfso asto furnish a suflicient 'volume of air, when the engine is standingstill, to complete combus tion and eliminate'smoke. v

Objection has been found in practice with combustion chambers'formed inthe waist of the boiler, in the particulars of the inevitableaccumulation of a greater or less'qua'ntity of cinders therein, and thediflic'ulty experienced in removing them. If an opening is made for thispurpose in the lower wall of the combustion chamber, liability toleakage, and

burning out of the rivets securing the j ointring, is experienced. Inorder toenable any accumulation of-cindersto be readily re: moved fromthe combustion chamber when ever desired, without involving the use ofany members ointed to a water space, I close 'tively. Adischarg'e.hopper, 1 1, closedbya the lower end of the combustion chamber, B, by abottom plate, 10, which is downwardly inclined from the -sides to themiddle .of the combustion chamber, and is secured toand supportedbyangle irons, l and 8, boltedtothe front portion of the mud ring,v1",and to the front flange of-thebearer, 8, respecinovable slide ordoor, 11, is secured 'to the bottom plate, -10, below and around acentral opening therein, and the bottom plate is. protected from the.heat of the cinders by a floor, 10*,fof firebrick or other refractoryunder the conditions of fuel and service; the

engine and entrance of an. operator'behind water spaces; and the supplyof a volume of heated air to consume the gases in their passage from thefire chamber to the combustion chamber. 1

a I claim as my invention and desire to sc cure by Letters Patent: v 1..The combination, with alocomotive and independent bearer extendingacross the firebox, near the bottom thereof. and

flue sheet, a mud ring, c0.m1ections securing the ends 'of said bearerto the :side

of the mud ring, a bridge wall of're actory material supported on saidbearer, abottom' plate closing-the space between the bridge wall and theflue sheet,'a discharge hopper secured to the bottom plate below acentral discharge openingqtherein, and a 'movable plate or slideclosingthe discharge' hopperz '2. The combination, withj ,a locomotivethe firebox, near" the bottomthereof and between the forward end ofthe'grate and the flue sheet,'a mud ring,'connect1ons securing the ends'of said bearer to the'side 4 ortions of the mud ring, a bridge wallof rectory material supported on said beaten, a bottom wall and the tidesheet, a floor of refractory 'material covering said bottom plate andcharge opening" therein a'dischargehop r, secured to. the'bottom;platebelow said d;-

, closing the discharge hopper.

8. The combination, with a locomotive material; which is inclined,bothilaterawv ooiler firebox having a fiuesheet, of a sepas. andlongitudinally, towardthe openi lg above the discharge hopper, so as to,ause

whenever desired, by openingthe door or Among the advantages of myinvention .which 'will'be apparent to those skilled in the construction,and operation of ;locomotives,-

are a the provision: of an effective combustion chamber, andthe-capacity of carrying a suit able depth of fire in a shallowfirebox,-without-involving the cost ofeonstruction' and maintenance ofthose-located within the waist of the boiler and above a bottom waterspace or wall, which latter necessitates a.

diminution of flue heating surface; the ability of application, atslight cost, to exlst ng locomotive boilers, particularly'where it-may'rate and independent bearer extending across the firebox, .near thebottom 1 thereof and between the forward end of the grate and the fluesheet, a mud ring, connections securing the ends of said bearer to theside 'ortionsof the mud ring, a bridge wall of re ractory-material'supported on said bearer, a bottom plate cl'osing'fthe spacebetween the bridge 'cu1-ed' .tothe frontjand rear sides of said mudjring and to the-bearer, respectivel 8.

below a central discharge opening therein,

:boiler firebox having a flue sheet, of a sepaprovided than is necessaryor economical-- facility of removal of accumulations of cin .derswithout requiring cooling down of the a the bridge, and withoutinvolving joints 1n boiler firebox. having a flue sheet, ofa separate etween thev forwardendof the grate and the ortions.

boiler firebox having a flue sheet, of a sepaf rateand independentbearer extending across;

ioo plate closing the space betweenthe bridge downwardly inclined towarda central-discharge opening, and amovable: plate or slide I wall and theflue; sheet, angle supports sebottom plate and to the front portionofthe discharge hopper secured to the bottom p ate a and a movable plateor slide closing'the.dis- 125 v 4. The comb nation, with a locomotive Yrate and independent bearer extending across 65 be found that a' largergrate area has been the,firebox, near the-bottom thereof and tween theforward end of the grate and the the ends of said bearer to the sideortions of the mud ring, a bridge wall of re ractory material supportedon said bearer and containing. a plurality of Vertical air passagesWhich open on its reariside'nea'r its top, downwardly and forwardlyextending air supply pipes secured to the bearer, each com- Inunica-tingwith one of the air passages and being open at its forward.- end, abottom plate closing the space between the bridge wall and the fluesheet, a discharge hopper secured to'the bottom plate below a centraldischarge opening therein, and a movable plate or slide closing thedischarge hopper. 5. The combination, with a locomotive boiler fireboxhaving a flue sheet, of'a separate and independent bearer extendingacross the firebox, near the bottom thereof, a mud ring, connectionssecuring the ends ofsaid bearer to the side ortions of the mud ring,grate bars exten mg between said bearer and the rear of the firebox andadapted to be supported on said bearer and on the rear portion of themud ring, a bridge-wallof refractory material supported on said bearer,a bottom plate closing the space between the bridge wall and the fluesheet, a dismovable hopper.

charge hopper secured to the bottonr plate I below a central dischargeopening therein, and a movable charge hopper.

6. The combination, with a locomotive boiler firebox having a fluesheet, of. a separate and independent bearer extending across thefirebox, near the bottom thereof, a mud ring, connections securing theends of said bearer to the side portions of the mud ring, grate barsextendin between said bearer and the rear of the firebox, a bridge wallof refractory material supported on said bearer and forming a divisionbetween a fire chamber space above the grate bars and a combustionchamber space between its forward side and the flue sheet, said bridgewall containing' a plurality of air passages which open at their upperends into the fire chamber space, and at their lower ends to theatmosphere, a bottom plate closing the bottom of the combustion chamberspace, a discharge hopper secured to the bottom plate below a centraldischarge opening therein, and a plate or slide closing the dischargeWitnesses:

' E. M. RHETT,

J .-R. KOERPER;

plate or slide closing the dis FREDERICK F. GAINES.

